Category B Factor Facilities

DOE-HDBK-1188-2006

67.

CATEGORY B REACTOR FACILITIES. Those test and research reactors designated by

DOE based on power level (e.g., design thermal power rating of less than 20 megawatts steady

state), potential fission product inventory, and experimental capability. [DOE O 5480.30]

68.

CAUSAL FACTOR. An event or condition in the accident sequence necessary and sufficient to

produce or contribute to the unwanted result. Causal factors fall into three categories: direct

cause, contribution cause, and root cause. [DOE G 225.1A-1]

69.

CAUSE. Anything that contributes to an accident or incident. In an investigation, the use of the

word "cause" as a singular term should be avoided. It is preferable to use it in the plural sense,

such as "causal factors," rather than identifying "the cause." [DOE G 225.1A-1]

70.

CEILING LIMIT. The concentration in the employee's breathing zone that shall not be

exceeded at any time during any part of the working day. For airborne contaminants, if

instantaneous monitoring is not feasible, then the ceiling shall be assessed as a 15-minute

time-weighted average exposure that shall not be exceeded at any time during the working day.

[DOE O 5480.10A (Draft)]

71.

CERTIFICATION. The process by which contractor facility management provides written

endorsement of the satisfactory achievement of qualification of a person for a position. [DOE O

5480.30]

72.

CERTIFICATION. A statement of professional opinion based upon knowledge and belief. A

written statement regarding a specific fact or representation that contains the following language:

Under civil or criminal penalties of law for the making or submission of false or fraudulent

statements or representations (18 U.S.C. 1001 and 15 U.S.C. 2615), I certify that the

information contained in or accompanying this document is true, accurate, and complete. As to

the identified Section(s) of this document for which I cannot personally verify truth and accuracy,

I certify as the company official having supervisory responsibility for the persons who, acting

under my direct instructions, made the verification that this information is true, accurate, and

complete. [RCRA/40 CFR 260.10]

73.

CHAIN OF CUSTODY. The process of documenting, controlling, securing, and accounting for

physical possession of evidence, from initial collection through final disposition. [DOE G

225.1A-1]

74.

CHANGE. Stress on a system that was previously in a state of equilibrium, or anything that

disturbs the planned or normal functioning of a system. [DOE G 225.1A-1]